Electric plug



SePt- 9, 1930. c. L. GooDsPEr-:D 1,775,564

ELECTRIC PLUG Filed Feb. 24, 192e Fi 1 Y I dHIlllllllllllllllllllllllIHIII INVENTOR wlTNEssEs Chaz-ZesL. Gau/weed li MM V BY M i A ATTORNEY Patented Sept. 9, 1930 maar oai-ICE cursasierra cas L.- eoonsaan, oir @am nro-oir, naw masas', assrsnoa ro AvisI.. GoonsrEEn, or oon, maw

:massa faire rnc@ Application mea aealary ai, 192e. serisiaauasaeso.

This inventionirelates to electrical exten sion cord push plugs, andcomprehends means constituting a part of the plug for facilitat` ing itsdisconnection from an outlet socket.-

It is a well-known fact that push p lu s tend to stickin the sockets,and due to t e fact that said plugs are constructed in such a manner as`to .aiord no means for facilitating their withdrawal or disconnectionfrom the sockets with which'they are associated,

:it-isl a common practice to employ the extension cord as a means forwitldrawingst'he plug from the socket. This results in breaka e of thecord, causing short circuits in adw'dition to subjecting the terminalposts to strain which eventually renders the plug unfit for use.

The present invention comprehends a simple, convenient, inexpensive andeicient means for facilitating the withdrawal and `disconnection of theplug from its ysocket without injury thereto or 'to the extension cordwhich is carried thereby.` l Furthermore, the invention comprehends ameans for facilitating the disconnection of an extension cord vpush plugfrom "a socket which elects a direct outward move ent of the plug fromthe socket so asto relieve the connectmg elements of lateral thrustswhich tend to injure the structure.

With the above recitedand other objects in view, reference is hada tothe following description and accompanying drawings in \which there isexhibited one example or embodiment ofthe invention while the appendedclaims define the actual scope of the invention. l n

In the drawingstion, illustrating the plug in ful and dotted lines,resdpectively, in the disconnected and connecte positions;

. e Fig. 2 is a sectional view through the plug and socket illustratingthe'plug in its conv connected.

\ Figure 1 is a side view with arts in sec-jV removed from the plug.

bearing and pull element attaching member Reerrin tothe drawings bycharacters of reference designates an outlet socket of any approvedtype, which is provided with female contact elements B disposed inalinement with apertures C in the wall orcasing .of the socket, throughwhich the contact legs D of the' plug E are ada ted to belinserted andeng ged with the emale contact elements .The plug E is provided with athreaded axial bore 10, which communicates with the recess 11 in theinner .face of the plug within which the contact legs D are attached inthe usual lmanner andwith which the terminals of the extension cord 12are The invention includes an exteriorly threaded thimble 13 which isthreaded into the bore 10 and which is provided at its outer end with anannular outwardly projecting flange. 14. A ring or annulus 15 havingdiametrically disposed finger-en aging hooks 16 is attached to the plugbodyy clamping of the ring or annulus 15 between the flange .14 and theouter end of the plug. A plunger or stem 17 extends through the thimble13, which acts as a bearing therefor, thereby mounting the plunger orstem inthe plug for axial movement with respect thereto.

end by a solid extremity 19. The plunger or v stem is preferably formedwith a slot 20 lin its wall, through which the extensioncord 12 extends.

In practice, with the stem or plunger 17 in the position illustrated inFig. 1, the plug -is pushed into the socket so that the contact legs Dare rictionally engaged with the female contact elements B. During thisoperation, the inner slot terminal 19 of the stem or plunger bearsagainst the central portion of the outer wall o'f the socket so that theplug E moves axiallyvthereof and relatively thereto to the positionillustrated indotted lines in Fig. 1 or the position illustrated in Fig.2. This causes the plunger or stem to roject outwardly an appreciabledistance om the outer end of the socket so that when it is desired todisconnect the plug from the socket, the index and middle lingers areengaged around the hooks or clips 16 and the thimble bears upon theu'lanipulating head 18 of the stem. By moving the plug outwardly on thestem or plunger by pulling the fingers toward the tlnunb, it is obviousthat the plunger acts as a guide -for causing the plug to move directlyoutwardly to prevent lateral movement which tends to injure thestructure 'of both the plug and socket. In order to limit the relativemovement of the plug With respect to the stem or plunger, the plunger 17is formed With peripheral beads 21 and 22 which coact with the thimble13.

I claim:

1. Au electrical extension cord push plug, including means carriedthereby for facilitating the disconnection of the plug from its socket,said means consisting of a stem extending axially through the plug andadapted to bear at its inner end upon the socket and finger engagingelements carried by the plug, a bushing through which the stem extendshaving threaded connection with the plug body and a head at one end ofsaid bushing for clamping the finger engaging elements to the plug body.

2. The combination, with an electrical extension cord push plug, ofmeans carried by the plug body for facilitating the disconnection of theplug from a socket, said means comprising a ring having diametricallydisposed linger engaging pull clips, a bushing threaded into the plugbody and extending through the ring for attaching the same thereto, anda thumb engaging plunger mounted for axial movement throughl the bushingand plug body and designed to bear at its inner end upon the centralportion of the socket to serve as a guide for causing a direct outwardmovement of the plug body from the socket.

Signed at New York, in the county of New York and State of New York this17th day of' February. A. l). '1928.

CHARLES L. GOODSPEED.

